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H. VAN HOEVENBERGH.

AUTOMATIC GOVERNOR FOR PRINTING TELEGRAPH TRANSMITTE-RS.

No. 316,687. Patented Apr. 28, 1885.

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H VAN HOEVENBERGH. AUTOMATIC GOVERNOR FOR PRINTING TELEGRAPH TRANSMITTERS. No. 316,687. Patented Apr. 28, 1885.

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3 H. VAN HOEVENBERGH.

AUTOMATIC GOVERNOR FOR PRINTING TELEGRAPH TRANSMITTERS.

No. 316,687. Patented Apr. 28, 1885.

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HENRY VAN HOEVENBERGH, OF ELIZABETH, NE\V JERSEY, ASSIGNOR TO THE BALTIMORE & OHIO TELEGRAPH COMPANY, OF BALTIMORE, MD.

AUTOMATIC GOVERNOR FOR PRINTING-TELEGRAPH TRANSMITTERS.

SPECIFICATION forming part of Letters Patent No. 316,687, dated April 28,1885.

Application filed August 7, 1884.

' To all whom it may concern.-

Be it known that I, HENRY VAN HoEvEN- BERGH, a citizen of the United States, residing in Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Vinding Devices for Transmitters for Printing-Telegraph Instruments, of which the following is a specification.

My invention relates to a class of devices employed'in connection with printing-telegraph instruments for regulating and controlling the movements of the same.

The invention is especially designed to be employed in connection with an instrument provided with means for conveniently storing up any required amount of energy and causing the same to be automatically applied to the transmitting device at such times as may be required.

The means which it is proposed to employ for supplying and storing the energy are organized as follows: Applied to a transmitter of any convenient form is a train of gearwheels connecting the transmitter with a suitable actuating spring or weight. This spring is designed to be wound by means of a ratchetwheel and a rack-bar applied thereto. The rack-bar is impelled in the proper direction for winding the spring by means of a system of pneumatic tubes and air chambers or bellows. To this end a primary bellows is employed, and this is equipped with a treadle, whereby the operator may conveniently employ it for forcing air into a storage bellows or chamber capable of containing any required amount of air under pressure. A tube leading from this storage-chamber connects with a third air-chamber constituting a windingbellows, which is provided with an automatically-operating valve, whereby the chamber is caused to alternately expand and contract. A contact disk or Wheel is applied to the revolving shaft of the instrument, and a frictionbrake is applied to this disk. The pressure of the brake is controlled by an automaticallyoperated governor, which causes it to be applied with greater or less force, according to the rate of revolution of the shaft.

In another application of even date herewith", Serial No.- 139,877, there is shown and (N0 model.)

described a Winding device for telegraph-hr struments, and I do not herein claim such winding device.

In the accompanying drawings, Figures 1 and 2 are respectively a plan View and side elevation of a transmitting device, together with the connecting gearwheels which are applied thereto for actuating the same. Fig.

3 is an elevation of the gear-wheels, together with a portion of the pneumatic apparatus; and Fig. 4 is an elevation showing the organization of the pneumatic chambers and tubes, together with the alarm device.

Referring to the drawings, A represents a suitable base, upon which the transmitter is supported. This transmitter may be of any suitable well-known form; but in this instance I have shown a cylinder, B, having a series of pins, 0, radially arranged in a manner well understood.

The cylinder B is designed to be placed directly beneath a suitable key-board having any required number of transmitting-keys, and these keys are designed to be thrust into 5 the path of the pins 0, respectively, at the will of the transmitting-operator. The cylin der B is carried upon a shaft, 0, supported in bearings c and 0". The shaft 0, and thus the cylinder B, is designed to be revolved by means of a train of gear-wheels, E.

It is usually desirable that the parts be so constructed that the cylinder may be arrested in any required position without entirely stopping the actuating mechanism. For this pur- 8 5 pose I prefer to couple the cylinder with the train ofgear-wheels E by means of an elec tro-magnetic clutch. This clutch consists of a disk, f, of soft iron, which is rigidly fixed upon the shaft 0, and revolves therewith. A11 0 electro-magnet, F, which is carried upon a shaft, 0, is applied to the disk f, and this electro-magnet has two or more poles, f ,which terminate in a plane parallel with that of the disk. The electro-magnet is so adjusted that 9 5 its poles revolve in contact with the plain surfaces of the soft-iron plate or disk f. The effect of this arrangement is, that when the electro-maguet is rendered powerfully magnetic the attraction exerted by it upon the disk is so great that the latter, together with the shaft 0, is compelled to revolve with it.

By this means thGrlllOhlOll of the revolving electroanagnet is communicated to the cylinder. XVhen, however, the elcetro-magnet is demagnetized,the cylinder is disconnected immediately, so that although the train of gear wheels E continues to be actuated the cylinder may be easily arrestet' The cylinder 13, which is preferably composed of non-conducting material, is not at tachcd rigidlyto the shaft 0, but is mounted loosely upon it. The circuit-connections of the eleetromagnet F may be completed and interrupted in any convenient manner, preferably, however, in the manner fully described in a former patcntgranted to me, No. 259,610.

The train of gear-wheels E terminates in a toothed wheel, 0, meshing with a pinion, 0", which is carried upon theshal't c of the elec tro-magnet F. The train of gear whecls Ereceives its motion from a spring, H, which is wound in a manner hereinafter described.

Upon the shaft 0 there is carried a disk, c, which serves both to support the electromagnet F and to afford a contact-surface for a governing-brake, 7. which is employed for the purpose of rendering themovement ofthe cylinder as uniform as possible.

A governor, K, of well-known construction, is coupled to the train of gear E by means ofsuitable beveled gear-wheels, h and if, the former of which is applied to the shaft c. .srn arm or lever, on, is coupled to the governor ii at one eXtremi y, and at the other extremity it carries the friction-brake k. The lever itselfis pivoted to a stationary support, It. drny undue increase in the rate of motion of the shaft 0, such as is liable to occur when the shaft 0" is relieved from the weight of the transmittingeylinder, will cause the arms of the governor K to be thrown outward, thereby actuating the lever m and forcing the bral-ze 7;? against the periphery of the wheel or dislc 7.; .[n this manner the rate of revolution of the shaft c, and thus of the cylinder 13, may be readily modified and controlled.

For the purpose of winding the spring H and keeping it under sufficient tension to actuate the mechanism, a system of pneumatic apparatus, which will now be described, is employed. A bellows, p, provided with a treadle, r, is located in a convenient place relative to the transmitting-instrument, so that the operator may at any time readily actuate the same. A spring, 1*, normally forces the treadle r upward, and, by means of the downward pressure exerted by the foot and the return movement occasioned by the spring, the bellows p may bealternately compressed and expanded. A valve, 3, is applied to this bellows for the purpose of admitting air. thereto in a well-known manner. A tube, L, leads from the bellows to a storagebellows, p, in which it is designed that the air shall le stored under pressure. An inlet-valve, s, is applied to this bellows at the entrance of the pipe 1/. This valve permits the air to be forced into, the bellows p through the pipe L, but priven "s its egress through the samepipe. A weight, 31, is preferablyapplied to the bellows p, and this weight is such as to place the air which is contained therein under sufficient pressure to accomplish the winding of the spring It, in the manner hereinafter de scribed. An outlet-pipe, t, leads from the bellows p" to a winding-bellows, p.

Inserted within the pipe is a centrallypivoted valve, s,which is constructed that the force of the air passing through the tube l will not actuate it in either direction; but whether itopened or closed, it will rest in that position until forcibly actuated by an external power. it crank, it, connects the arbor of the valve 5" with a rod, if, extending in a direction parallel to thedireetion of movement of the upper portion of the bellows p In the rod 71 is formed an elongated opening or loop, or. in arm, or", extends froin the outlet-valve s of the bellows 1) through the loop a". At the lower limit of the excursion of the upper portion of the bellows p the arm a is engaged by the lower endot' the loop a, thereby forcing the arm a" upward and causing the valve s to be closed. The same movement of the bellows 2 causes the arm a" to press against the lower end of the loop a with suflicicnt force to carry the rod a downward, thereby opening the valve 5. The air thereby passes from the bellows p through the tube f and fills the bellows p. The upward movement of the upper portion of the bellows 1) causes the arm a to engage the upper end of the loop a, thereby first causing the valve 5 to be closed and immediately afterward forcing the valve 5: to open. During the expansion of the bellowsp lllOl'llCli-bftlt), which carried upon the upper portion of the bellows, causes the wheel o" to be actuated through the instrumcntality of a. pinion, v, which is engaged bythe rack-bar. The wheel if is connected with the shalt '1', carrying the spring H, by n'ieans of a pawl, r, and ratchetwheel i in the usual manner employed in clock-work for the purpose of winding aspring. The upward movement of the arm '0 causes the spring to be wound, while the downward movementof the same is permitted without actuatingthe shalt 27. immediately upon the opening ofthe valve c the bellowsp collapses, thereby carrying the rack-bar '0 downward, and the operation is again automatically repeated. When, however, the spring H has been wound to its li t, the pressure of the air through thepipe i" will be overcome by the resistance offered by the spring, so that the bellows p will not evpatid to its limit; but asthetension of the spring is released through the operation of the transmitter the bellows will gradually expand until the valve 8" is again closed and the valv .5" opened. It will re now understood that so long as thebellows p is 'kept'supplied with air the spring Ifj will be lcept under tension. The spring is IIO preferably of such length that it will furnish power to the transmitter for any convenient time independently of the bellows 19.

For the purpose of givn g an alarm when the bellows 19 has become exhausted, one pole of a battery, w, is connected by means of a conductor, 1, with a contactspring, w, carried at the lower end of the bellows p and the opposite pole of this battery is connected, by means of a conductor, 2, including an alarm-bell, 10 with a second contact-spring, 20", carried upon the upper portion of the bellows. The springs w and 10 project toward each other, and carry contact-points, which are placed in electrical connection with each other when the air c011- tainedin thebellows is nearly exhausted. The circuit of the battery 10 is thus completed, and the bell is automatically actuated when the attention of the operator is required.

I claim as my invention- 1. In a printing-telegraph instrument, the combination, substantially as hereinbefore set forth, witha revolving shaft of the instrument, of a contact disk or wheel applied to said shaft, 2. friction-brake applied to said disk, and an automatically-operating governor for applying said brake with greater or less force to said disk, according to the rate of revolution of said shaft.

2. The combination, substantially as hereinbefore set forth, in a printing-telegraph transmitting-instrument, of the shaft c,the cylinder B, the revolving electro-magnet F, the disk f, attached to said shaft, the automatic governor, the contact-disk moving with said electro-magnet, and the brake applied to said contact-disk and controlled by said governor.

In testimony whereof I have hereunto sub scribed my name this 26th day of June, A. D. 188i.

HENRY VAN HOEVENBERGH. [L. s.]

Vitnesses:

DANL. WV. EDGECOMB, CHARLES A. TERRY. 

